Toy building brick socket



FIG. 1 is a front, top and right side perspective view of a toy building brick socket in accordance with our new design;

FIG. 2 is a front elevation view thereof; and,

FIG. 3 is an enlarged perspective view thereof.

The broken lines immediately adjacent the shaded areas represent the bounds of the claim and all other broken lines represent the environment in which the design resides. None of the broken lines form a part of the claimed design. 

The ornamental design for a toy building brick socket, as shown and described. 